Revert "[T6] Updating the hotword pipeline gain settings."

This reverts commit de07b38b16eb080fcc7177e7d9c56f2f57a9b519.

Reverting this change until we find the optimal gain setting for the
hotword pipeline.

Bug: 215251713
Test: build
Change-Id: Ica6c59ec4c413c7ad3aed301509f3ef914606bea